%% problemset environment is base on elegantbook.cls
%% start of file `elegantbook.cls'.
%% Copyright 2013-2019 ElegantLaTeX (elegantlatex2e@gmail.com)
%%
%% This work may be distributed and/or modified freely
%% available at https://github.com/ElegantLaTeX/ElegantBook
\usepackage{adforn}
% list/itemize/enumerate setting
\usepackage[shortlabels]{enumitem}
\newenvironment{problemset}[1][\textbf{\chaptername\; \problemsetTitle}]{
\begin{center}
\textcolor{structurecolor}{\Large\bfseries\adftripleflourishleft~#1~\adftripleflourishright}
\end{center}
\begin{enumerate}[label=\textcolor{structurecolor}{\arabic*.}]}{%
\end{enumerate}}